Can a Pokemon with an attack that does damage to the opponent's Bench get through Mr. Mime's "Bench Barrier" Ability if the Attacking Pokemon has Stealthy Hood attached?
No, it does not get through. The Bench Barrier Ability is not "being done" to the Attacking Pokemon.
Source: TPCi Rules Team (2019-05-30)
Can I use Lycanroc-GX's "Bloodthirsty Eyes to target an opponent's Pokemon with Stealthy Hood attached?
Bloodthirsty Eyes can target a Benched Pokemon with Stealthy Hood attached, but its effect would be immediately blocked. However, if the Pokemon with Stealthy Hood is Active, Bloodthirsty Eyes can target a Benched Pokemon without a Stealthy Hood and the switch would take place.
Source: TPCi Rules Team (2019-05-30)
Does Martial Arts Dojo stadium's +40 more damage apply to Benched Pokemon?
Although the secondary effect is missing the "to the opponent's Active Pokemon" phrase, the intent is for the +40 more damage to only apply to the opponent's Active Pokemon.
Source: TPCi Rules Team (2019-05-09)
If I play Lt. Surge's Strategy first, can I then play a second (or third) Lt. Surge's Strategy to play more than 3 Supporters?
Nope, that doesn't work. The second Lt. Surge's Strategy does not add to the number of additional Supporter cards you can play, so you can't play the second one at all because you cannot play Trainer cards for no effect.
Source: Unbroken Bonds FAQ (2019-04-19), TPCi Rules Team (2019-05-09)
If I have Miltank with the "Moomoo Malt" Ability as my Active Pokemon and I use Welder to attach 2 Fire Energy cards to a Benched Pokemon, does it heal 90 or 180 damage?
Any energies attached from the hand would trigger Moomoo Malt, once for each energy card being attached. So in this case you would heal 180 damage.
Source: TPCi Rules Team (2019-05-09)
Can I use Welder if there are no Fire Energy cards in my hand?
No, you cannot. You must be able to attach at least 1 Fire Energy card in order to use Welder.
Source: TPCi Rules Team (2019-05-09)
If I use Welder and attach a Fire Energy to an Eevee that has the "Energy Evolution" Ability, do I draw the cards for Welder first or search for a Flareon due to "Energy Evolution" first (or is it a choice)?
Since they are simultaneous actions, it is the player's choice of which order they can do this.
Source: TPCi Rules Team (2019-05-09)
If I have Pokemon GX with Abilities in play and the Power Plant Stadium is also play, can I now play Green's Exploration since those Pokemon "have no Abilities"?
Yes, you would be able to play Green's Exploration in that case.
Source: Unbroken Bonds FAQ (2019-04-19), TPCi Rules Team (2019-05-02)
If Wondrous Labyrinth {*} stadium is in play, how many energy are needed for energyless attacks?
Any attacks that normally cost no energy now require at least one energy to be attached when Wondrous Labyrinth {*} is in play. However, if an effect like Persian's "Gathering of Cats" Ability sets an attack's cost to zero energy, Wondrous Labyrinth {*} does not add an additional energy requirement to it.
Source: TPCi Rules Team (2019-05-02)
If I had used Muk & Alolan Muk GX's "Severe Poison" attack that places extra Poison damage counters and in the next turn use Koga's Trap, do they still place the extra Poison damage?
No, they don't. The new, normal Poison Special Condition replaces the old Severe Poison Special Condition.
Source: Unbroken Bonds FAQ (2019-04-19), TPCi Rules Team (2019-05-02)